rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2677 jiffies s: 131485 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 25483 Comm: syz.9.6477 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:690 Code: e9 f5 04 00 00 90 90 90 90 90 0f 01 ca fc 6a ff e8 f5 03 00 00 48 89 c4 48 89 e7 e8 da c7 ea ff e9 d5 04 00 00 90 90 90 90 90 <0f> 01 ca fc 6a ff e8 d5 03 00 00 48 89 c4 48 89 e7 e8 2a c6 ea ff RSP: 0018:ffffc90000007558 EFLAGS: 00000046 RAX: 1ffff1100be5a809 RBX: ffff88805f2d4048 RCX: 0000000000000100 RDX: ffff888024450000 RSI: 0000000000000080 RDI: 000000000000001c RBP: ffffc900000077b0 R08: ffff88805f2d4187 R09: 1ffff1100be5a830 R10: dffffc0000000000 R11: ffffed100be5a831 R12: dffffc0000000000 R13: ffffc90000007ae8 R14: 0000000000000000 R15: 1ffff1100ae0d30a FS: 00007f5e0003e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000000012c0 CR3: 0000000023a14000 CR4: 00000000003506f0 DR0: 0000000000008d24 DR1: 0000000000000000 DR2: 0000000000008d24 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: RIP: 0010:ieee80211_rx_h_sta_process net/mac80211/rx.c:1811 [inline] RIP: 0010:ieee80211_rx_handlers+0x16a0/0x76e0 net/mac80211/rx.c:4053 Code: 0a e8 d4 3a d8 f7 e9 41 02 00 00 48 8b 44 24 48 48 8d 58 48 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 70 62 29 f8 <48> 8b 1b 48 83 c3 58 48 89 df be 08 00 00 00 e8 ec 63 29 f8 48 89 RSP: 0018:ffffc90000007580 EFLAGS: 00000246 ieee80211_invoke_rx_handlers net/mac80211/rx.c:4102 [inline] ieee80211_prepare_and_rx_handle+0x2007/0x61e0 net/mac80211/rx.c:4927 __ieee80211_rx_handle_packet net/mac80211/rx.c:5185 [inline] ieee80211_rx_list+0x25fd/0x2e40 net/mac80211/rx.c:5315 ieee80211_rx_napi+0x1aa/0x3c0 net/mac80211/rx.c:5338 ieee80211_rx include/net/mac80211.h:4849 [inline] ieee80211_handle_queued_frames+0x104/0x1a0 net/mac80211/main.c:317 tasklet_action_common+0x2d0/0x460 kernel/softirq.c:827 handle_softirqs+0x291/0x910 kernel/softirq.c:596 __do_softirq kernel/softirq.c:630 [inline] invoke_softirq kernel/softirq.c:470 [inline] __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline] sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6874 Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 55 44 25 f7 e8 70 0f 55 f7 fb bf 01 00 00 00 25 ba ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f RSP: 0018:ffffc900032d7c40 EFLAGS: 00000286 RAX: a8e165b7b0a66000 RBX: 0000000000000000 RCX: a8e165b7b0a66000 RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: 0000000000000001 RBP: ffffc900032d7ce0 R08: ffffffff90af233f R09: 1ffffffff215e467 R10: dffffc0000000000 R11: fffffbfff215e468 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff9200065af88 irqentry_exit+0x63/0x70 kernel/entry/common.c:439 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:__do_sys_perf_event_open kernel/events/core.c:12829 [inline] RIP: 0010:__se_sys_perf_event_open+0x1ad0/0x1ec0 kernel/events/core.c:12418 Code: 8b 5c 24 30 48 89 df e8 ce 3a 00 00 48 89 df e8 f6 43 00 00 49 8d 7d 48 e8 bd 2f 8e 08 4c 89 ef e8 75 a0 fe ff 48 8b 7c 24 30 <48> 83 c7 48 e8 a7 2f 8e 08 80 7c 24 24 00 74 07 e8 cb 89 dc ff eb RSP: 0018:ffffc900032d7da0 EFLAGS: 00000246 RAX: a8e165b7b0a66000 RBX: ffff88806844a400 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffff88806844a400 RBP: ffffc900032d7f10 R08: ffffffff90af233f R09: 1ffffffff215e467 R10: dffffc0000000000 R11: fffffbfff215e468 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888068416000 R15: 1ffff9200065afc0 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f5dff19ce59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e0003e028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f5dff415fa0 RCX: 00007f5dff19ce59 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000012c0 RBP: 00007f5dff232e6f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5dff416038 R14: 00007f5dff415fa0 R15: 00007fff4dcb5798